<!DOCTYPE html>
<html lang="en-US">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>try_lock_mutex [HALCON算子参考手册]</title>
<style type="text/css">
      body {
    color: #000000;
    background-color: #ffffff;
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
}

.body_main {
    margin-left: 35px;
    margin-right: 35px;
}

@media screen and (min-width:992px) {

    .body_main {
        margin-left: 10%;
        margin-right: 10%;
    }

    table.toctable {
        width: 80%
    }
}

@media screen and (min-width:1400px) {

    .body_main {
        margin-left: 15%;
        margin-right: 15%;
    }

    table.toctable {
        width: 70%
    }
}

body>div ul ul {
    margin-left: inherit;
}

a:link {
    color: #0044cc;
}

a:link,
a:visited {
    text-decoration: none;
}

a:link:hover,
a:visited:hover {
    text-decoration: underline;
}

th {
    text-align: left;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    text-rendering: optimizeLegibility;
    color: #666666;
}

code {
    font-family: monospace,monospace;
}

h1 a.halconoperator {
    font-family: Arial, Helvetica, sans-serif;
    color: #666666;
}

h2 a.halconoperator {
    font-family: Arial, Helvetica, sans-serif;
    color: #666666;
}

hr {
    border: 0;
    border-top: solid 1px #f28d26;
}

.pre {
    display: block;
    padding-bottom: 1ex;
    font-family: monospace;
    white-space: pre;
}

pre {
    font-family: monospace, monospace;
    padding: 1ex;
    white-space: pre-wrap;
}

.toc {
    font-size: 80%;
    border-top: 1px dashed #f28d26;
    border-bottom: 1px dashed #f28d26;
    padding-top: 5px;
    padding-bottom: 5px;
}

.inv {
    margin: 0;
    border: 0;
    padding: 0;
}

.banner {
    color: #666666;
    padding-left: 1em;
}

.logo {
    background-color: white;
}

.keyboard {
    font-size: 80%;
    padding-left: 3px;
    padding-right: 3px;
    border-radius: 5px;
    border-width: 1px;
    border-style: solid;
    border-color: #f28d26;
    background-color: #f3f3f3;
}

.warning {
    margin-top: 2ex;
    margin-bottom: 1ex;
    padding: 10px;
    text-align: center;
    border: 1px solid;
    color: #bb0000;
    background-color: #fff7f7
}

.imprint {
    margin-top: 1ex;
    font-size: 80%;
    color: #666666;
}

.imprinthead {
    font-weight: bolder;
    color: #666666;
}

.indexlink {
    text-align: right;
    padding-bottom: 5px;
}

.postscript {
    margin-top: 2ex;
    font-size: 80%;
    color: #666666
}

.evenrow {
    background-color: #e7e7ef;
    vertical-align: top;
}

.oddrow {
    background-color: #f7f7ff;
    vertical-align: top;
}

.headrow {
    background-color: #97979f;
    color: #ffffff;
    vertical-align: top;
}

.logorow {
    vertical-align: top;
}

.error {
    color: red;
}

.var {
    font-style: italic
}

.halconoperator {
    font-family: monospace, monospace;
}

span.operator {
    font-family: monospace, monospace;
}

span.procedure {
    font-family: monospace, monospace;
}

span.operation {
    font-family: monospace, monospace;
}

span.feature {
    font-family: Arial, Helvetica, Homerton, sans-serif;
}

ul {
    padding-left: 1.2em;
}

li.dot {
    list-style-type: square;
    color: #f28d26;
}

.breadcrumb {
    font-size: 80%;
    color: white;
    background-color: #062d64;
    margin-bottom: 20px;
    padding-left: 35px;
    padding-right: 35px;
    padding-bottom: 15px;
}

.webbar {
    font-size: 80%;
    background-color: #dddddd;
    margin-top: 0px;
    margin-left: -35px;
    margin-right: -35px;
    margin-bottom: 0px;
    padding-top: 5px;
    padding-left: 35px;
    padding-right: 35px;
    padding-bottom: 5px;
}

.footer {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    border-top: 1px dashed #f28d26;
    font-size: 80%;
    color: #666666;
    padding-bottom: 8px;
}

.footer .socialmedia a {
    padding-left: 7px;
}

.socialmedia {
    padding-top: 10px;
}

.copyright {
    margin-top: 19px;
}

.breadcrumb a {
    color: #ffffff;
    border-bottom: 1px solid white;
}

.breadcrumb a:link:hover,
.breadcrumb a:visited:hover {
    text-decoration: none;
    border-bottom: none;
}

.heading {
    margin-top: 1ex;
    font-size: 110%;
    font-weight: bold;
    color: #666666;
}

.text {
    color: black;
}

.example {
    font-size: 80%;
    background-color: #f3f3f3;
    border: 1px dashed #666666;
    padding: 10px;
}

.displaymath {
    display: block;
    text-align: center;
    margin-top: 1ex;
    margin-bottom: 1ex;
}

.title {
    float: left;
    padding-top: 3px;
    padding-bottom: 3px;
}

.signnote {
    font-family: Arial, Helvetica, Homerton, sans-serif;
    font-size: 80%;
    color: #666666;
    font-weight: lighter;
    font-style: italic
}

.par {
    margin-bottom: 1.5em;
}

.parhead {
    text-align: right;
}

.parname {
    float: left;
}

.pardesc {
    font-size: 85%;
    margin-top: 0.5em;
    margin-bottom: 0.5em;
    margin-left: 2em;
}

.parcat {
    color: #666;
    font-weight: bold;
}

*[data-if=cpp],
*[data-if=c],
*[data-if=dotnet],
*[data-if=com],
*[data-if=python] {
    display: none;
}

.tabbar {
    text-align: right;
    border-bottom: 1px solid #f28d26;
    margin-bottom: 0.5em;
}

ul.tabs {
    padding-top: 3px;
    padding-bottom: 3px;
    margin-top: 10px;
    margin-bottom: 0;
    font-size: 80%
}

ul.tabs li {
    padding-top: 3px;
    padding-bottom: 3px;
    display: inline;
    overflow: hidden;
    list-style-type: none;
    margin: 0;
    margin-left: 8px;
    border-top: 1px solid #666;
    border-left: 1px solid #666;
    border-right: 1px solid #666;
}

ul.tabs li.active {
    border-left: 1px solid #f28d26;
    border-right: 1px solid #f28d26;
    border-top: 1px solid #f28d26;
    border-bottom: 1px solid #fff;
}

ul.tabs li.inactive {
    background-color: #eee;
}

ul.tabs li a {
    padding-left: 5px;
    padding-right: 5px;
    color: #666;
}

ul.tabs li a:link:hover {
    text-decoration: none;
}

ul.tabs li.inactive a {
    color: #666;
}

ul.tabs li.active a {
    color: black;
}

dl.generic dd {
    margin-bottom: 1em;
}

.pari {
    color: olive;
}

.paro {
    color: maroon;
}

.comment {
    font-size: 80%;
    color: green;
    white-space: nowrap;
}

table.grid {
    border-collapse: collapse;
}

table.grid td {
    padding: 5px;
    border: 1px solid;
}

table.layout {
    border: 0px;
}

table.layout td {
    padding: 5px;
}

table.table {
    border-collapse: collapse;
}

table.table td {
    padding: 5px;
    border-left: 0px;
    border-right: 0px;
}

table.table tr:last-child {
    border-bottom: 1px solid;
}

table.table th {
    padding: 5px;
    border-top: 1px solid;
    border-bottom: 1px solid;
    border-left: 0px;
    border-right: 0px;
}

.details_summary {
    cursor: pointer;
}

table.toctable {
    width: 100%;
}

table.toctable col:first-child {
    width: 20%;
}

table.toctable col:nth-last-child(2) {
    width: 8%;
}

table.altcolored tr:nth-child(even) {
    background-color: #f3f3f3;
}

    </style>
<!--OP_REF_STYLE_END-->
<script>
    <!--
var active_lang='hdevelop';function switchVisibility(obj,active_lang,new_lang)
{var display_style='inline';
for(var i=0;i<obj.length;i++)
{if(obj.item(i).getAttribute('data-if')==new_lang)
{obj.item(i).style.display=display_style;}
if(obj.item(i).getAttribute('data-if')==active_lang)
{obj.item(i).style.display='none';}}
return;}
function toggleLanguage(new_lang,initial)
{if(active_lang!=new_lang)
{var lis=document.getElementsByTagName('li');for(var i=0;i<lis.length;i++)
{if(lis.item(i).id=='syn-'+new_lang)
{lis.item(i).className='active';}
else
{lis.item(i).className='inactive';}}
var divs=document.getElementsByTagName('div');var spans=document.getElementsByTagName('span');switchVisibility(divs,active_lang,new_lang);switchVisibility(spans,active_lang,new_lang);if(!initial)
{setCookie("halcon_reference_language",new_lang,null,null);}
active_lang=new_lang;}
return;}
function setCookie(name,value,domain,exp_offset,path,secure)
{localStorage.setItem(name,value);}
function getCookie(name)
{return localStorage.getItem(name);}
function initialize()
{var qs=location.href.split('?')[1];var qs_lang_raw=location.href.split('interface=')[1];var qs_lang;if(qs_lang_raw)
{qs_lang=qs_lang_raw.split('#')[0];}
var cookie_lang=getCookie("halcon_reference_language");var new_lang;if((qs_lang=="hdevelop")||(qs_lang=="dotnet")||(qs_lang=="python")||(qs_lang=="cpp")||(qs_lang=="c"))
{new_lang=qs_lang;setCookie("halcon_reference_language",new_lang,null,null);}
else if((cookie_lang=="hdevelop")||(cookie_lang=="dotnet")||(cookie_lang=="python")||(cookie_lang=="cpp")||(cookie_lang=="c"))
{new_lang=cookie_lang;}
else
{new_lang="hdevelop";}
toggleLanguage(new_lang,1);return;}
-->

  </script>
</head>
<body onload="initialize();">
<div class="breadcrumb">
<br class="inv"><a href="index.html">目录</a> / <a href="toc_system.html">系统</a> / <a href="toc_system_multithreading.html">Multithreading</a><br class="inv">
</div>
<div class="body_main">
<div class="tabbar"><ul class="tabs">
<li id="syn-hdevelop" class="active"><a href="javascript:void(0);" onclick="toggleLanguage('hdevelop')" onfocus="blur()">HDevelop</a></li>
<li id="syn-dotnet" class="inactive"><a href="javascript:void(0);" onclick="toggleLanguage('dotnet')" onfocus="blur()">.NET</a></li>
<li id="syn-python" class="inactive"><a href="javascript:void(0);" onclick="toggleLanguage('python')" onfocus="blur()">Python</a></li>
<li id="syn-cpp" class="inactive"><a href="javascript:void(0);" onclick="toggleLanguage('cpp')" onfocus="blur()">C++</a></li>
<li id="syn-c" class="inactive"><a href="javascript:void(0);" onclick="toggleLanguage('c')" onfocus="blur()">C</a></li>
</ul></div>
<div class="indexlink">
<a href="index_classes.html"><span data-if="dotnet" style="display:none;">类别</span><span data-if="cpp" style="display:none;">类别</span></a><span data-if="dotnet" style="display:none;"> | </span><span data-if="cpp" style="display:none;"> | </span><a href="index_by_name.html">算子列表</a>
</div>
<!--OP_REF_HEADER_END-->
<h1 id="sec_name">
<span data-if="hdevelop" style="display:inline;">try_lock_mutex</span><span data-if="c" style="display:none;">T_try_lock_mutex</span><span data-if="cpp" style="display:none;">TryLockMutex</span><span data-if="dotnet" style="display:none;">TryLockMutex</span><span data-if="python" style="display:none;">try_lock_mutex</span> (算子名称)</h1>
<h2>名称</h2>
<p><code><span data-if="hdevelop" style="display:inline;">try_lock_mutex</span><span data-if="c" style="display:none;">T_try_lock_mutex</span><span data-if="cpp" style="display:none;">TryLockMutex</span><span data-if="dotnet" style="display:none;">TryLockMutex</span><span data-if="python" style="display:none;">try_lock_mutex</span></code> — Lock a mutex synchronization object.</p>
<h2 id="sec_synopsis">参数签名</h2>
<div data-if="hdevelop" style="display:inline;">
<p>
<code><b>try_lock_mutex</b>( :  : <a href="#MutexHandle"><i>MutexHandle</i></a> : <a href="#Busy"><i>Busy</i></a>)</code></p>
</div>
<div data-if="c" style="display:none;">
<p>
<code>Herror <b>T_try_lock_mutex</b>(const Htuple <a href="#MutexHandle"><i>MutexHandle</i></a>, Htuple* <a href="#Busy"><i>Busy</i></a>)</code></p>
</div>
<div data-if="cpp" style="display:none;">
<p>
<code>void <b>TryLockMutex</b>(const HTuple&amp; <a href="#MutexHandle"><i>MutexHandle</i></a>, HTuple* <a href="#Busy"><i>Busy</i></a>)</code></p>
<p>
<code>Hlong <a href="HMutex.html">HMutex</a>::<b>TryLockMutex</b>() const</code></p>
</div>
<div data-if="com" style="display:none;"></div>
<div data-if="dotnet" style="display:none;">
<p>
<code>static void <a href="HOperatorSet.html">HOperatorSet</a>.<b>TryLockMutex</b>(<a href="HTuple.html">HTuple</a> <a href="#MutexHandle"><i>mutexHandle</i></a>, out <a href="HTuple.html">HTuple</a> <a href="#Busy"><i>busy</i></a>)</code></p>
<p>
<code>int <a href="HMutex.html">HMutex</a>.<b>TryLockMutex</b>()</code></p>
</div>
<div data-if="python" style="display:none;">
<p>
<code>def <b>try_lock_mutex</b>(<a href="#MutexHandle"><i>mutex_handle</i></a>: HHandle) -&gt; int</code></p>
</div>
<h2 id="sec_description">描述</h2>
<p><code><span data-if="hdevelop" style="display:inline">try_lock_mutex</span><span data-if="c" style="display:none">try_lock_mutex</span><span data-if="cpp" style="display:none">TryLockMutex</span><span data-if="com" style="display:none">TryLockMutex</span><span data-if="dotnet" style="display:none">TryLockMutex</span><span data-if="python" style="display:none">try_lock_mutex</span></code> behaves identically to <a href="lock_mutex.html"><code><span data-if="hdevelop" style="display:inline">lock_mutex</span><span data-if="c" style="display:none">lock_mutex</span><span data-if="cpp" style="display:none">LockMutex</span><span data-if="com" style="display:none">LockMutex</span><span data-if="dotnet" style="display:none">LockMutex</span><span data-if="python" style="display:none">lock_mutex</span></code></a>, except
that it does not block the calling thread if the mutex is already locked by
another thread but returns immediately. The state of the mutex before trying
to lock it is returned in <a href="#Busy"><i><code><span data-if="hdevelop" style="display:inline">Busy</span><span data-if="c" style="display:none">Busy</span><span data-if="cpp" style="display:none">Busy</span><span data-if="com" style="display:none">Busy</span><span data-if="dotnet" style="display:none">busy</span><span data-if="python" style="display:none">busy</span></code></i></a>. <i>1</i> indicates that the mutex
was already locked before calling <code><span data-if="hdevelop" style="display:inline">try_lock_mutex</span><span data-if="c" style="display:none">try_lock_mutex</span><span data-if="cpp" style="display:none">TryLockMutex</span><span data-if="com" style="display:none">TryLockMutex</span><span data-if="dotnet" style="display:none">TryLockMutex</span><span data-if="python" style="display:none">try_lock_mutex</span></code>, <i>0</i> that
the mutex was unlocked (signaled).
</p>
<h2 id="sec_execution">运行信息</h2>
<ul>
  <li>Multithreading type: independent (runs in parallel even with exclusive operators).</li>
<li>多线程作用域:全局(可以从任何线程调用)。</li>
  <li>未经并行化处理。</li>
</ul>
<h2 id="sec_parameters">参数表</h2>
  <div class="par">
<div class="parhead">
<span id="MutexHandle" class="parname"><b><code><span data-if="hdevelop" style="display:inline">MutexHandle</span><span data-if="c" style="display:none">MutexHandle</span><span data-if="cpp" style="display:none">MutexHandle</span><span data-if="com" style="display:none">MutexHandle</span><span data-if="dotnet" style="display:none">mutexHandle</span><span data-if="python" style="display:none">mutex_handle</span></code></b> (input_control)  </span><span>mutex <code>→</code> <span data-if="dotnet" style="display:none"><a href="HMutex.html">HMutex</a>, </span><span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">HHandle</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (handle)</span><span data-if="dotnet" style="display:none"> (<i>IntPtr</i>)</span><span data-if="cpp" style="display:none"> (<i>HHandle</i>)</span><span data-if="c" style="display:none"> (<i>handle</i>)</span></span>
</div>
<p class="pardesc">Mutex synchronization object.</p>
</div>
  <div class="par">
<div class="parhead">
<span id="Busy" class="parname"><b><code><span data-if="hdevelop" style="display:inline">Busy</span><span data-if="c" style="display:none">Busy</span><span data-if="cpp" style="display:none">Busy</span><span data-if="com" style="display:none">Busy</span><span data-if="dotnet" style="display:none">busy</span><span data-if="python" style="display:none">busy</span></code></b> (output_control)  </span><span>number <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">int</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (integer)</span><span data-if="dotnet" style="display:none"> (<i>int</i> / </span><span data-if="dotnet" style="display:none">long)</span><span data-if="cpp" style="display:none"> (<i>Hlong</i>)</span><span data-if="c" style="display:none"> (<i>Hlong</i>)</span></span>
</div>
<p class="pardesc">Mutex already locked?</p>
</div>
<h2 id="sec_result">结果</h2>
<p>If the mutex handle is valid, 该算子 <code><span data-if="hdevelop" style="display:inline">try_lock_mutex</span><span data-if="c" style="display:none">try_lock_mutex</span><span data-if="cpp" style="display:none">TryLockMutex</span><span data-if="com" style="display:none">TryLockMutex</span><span data-if="dotnet" style="display:none">TryLockMutex</span><span data-if="python" style="display:none">try_lock_mutex</span></code>
returns <TT>2</TT> (
      <TT>H_MSG_TRUE</TT>)
    . 如有必要，将引发异常。
</p>
<h2 id="sec_predecessors">可能的前置算子</h2>
<p>
<code><a href="create_mutex.html"><span data-if="hdevelop" style="display:inline">create_mutex</span><span data-if="c" style="display:none">create_mutex</span><span data-if="cpp" style="display:none">CreateMutex</span><span data-if="com" style="display:none">CreateMutex</span><span data-if="dotnet" style="display:none">CreateMutex</span><span data-if="python" style="display:none">create_mutex</span></a></code>
</p>
<h2 id="sec_successors">可能的后置算子</h2>
<p>
<code><a href="unlock_mutex.html"><span data-if="hdevelop" style="display:inline">unlock_mutex</span><span data-if="c" style="display:none">unlock_mutex</span><span data-if="cpp" style="display:none">UnlockMutex</span><span data-if="com" style="display:none">UnlockMutex</span><span data-if="dotnet" style="display:none">UnlockMutex</span><span data-if="python" style="display:none">unlock_mutex</span></a></code>
</p>
<h2 id="sec_see">参考其它</h2>
<p>
<code><a href="lock_mutex.html"><span data-if="hdevelop" style="display:inline">lock_mutex</span><span data-if="c" style="display:none">lock_mutex</span><span data-if="cpp" style="display:none">LockMutex</span><span data-if="com" style="display:none">LockMutex</span><span data-if="dotnet" style="display:none">LockMutex</span><span data-if="python" style="display:none">lock_mutex</span></a></code>
</p>
<h2 id="sec_module">模块</h2>
<p>
Foundation</p>
<!--OP_REF_FOOTER_START-->
<hr>
<div class="indexlink">
<a href="index_classes.html"><span data-if="dotnet" style="display:none;">类别</span><span data-if="cpp" style="display:none;">类别</span></a><span data-if="dotnet" style="display:none;"> | </span><span data-if="cpp" style="display:none;"> | </span><a href="index_by_name.html">算子列表</a>
</div>
<div class="footer">
<div class="copyright">HALCON算子参考手册 Copyright © 2015-2023 51Halcon</div>
</div>
</div>
</body>
</html>
